Lubricating system for the spindle and table drive for vertical boring and turning mills.



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Patented May 30, 1916.

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INVENTOR F. F. CLARKE. LUBRICATING SYSTEM FOR THE SPINDLE AND TABLE DRIVE FOR VERTICAL some AND TURNING MILLS. APPLICATION FlL ED DEC-3, 1914.

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- F. F. CLARKE. LUBRICATING SYSTEM FOR THE SPINDLE AND TABLE DRIVE FOR VERTICAL BORING AND TURNING MILLS. APPLICATION FILED DEC-3,1914.

Patented May 30,1916.

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WITNESSES F. F. CLARKE. YLU'BRICATING SYSTEM FOR THE SPINDLE AND TABLE DRIVE FOR VERTICAL BORING AND TURNING MILLS. APPLICATION FILED DEC-3,19l4.

Patented May 30, 1916.

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FREDERICK F. CLARKE, OF FRANKLIN, PENNSYLVANIA, ASSIGNOIt TO COLBURN MAGHINE TOOL COMPANY, OF FRANKLIN, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

LUBRICATING SYSTEM FOR THE SP'INDLE AND TABLE DRIVE FOR VERTICAL BORING I AND TURNING MILLS.

Specification of Letters Patent.

Patented May so, mic

Application filed December 3, 1914. Serial No. 375,328.

To all whom it may concern Be it known that I, FREDERICK FZGIJARKE, citizen of the United States, resldlng at Franklin, in the county of Venango and State of Pennsylvania, have invented certain new and useful Improvements in Lubrlcating Systems for the Spindle and Table Drive for Vertical Boring and Turning Mills, of which the following is a spec1fication.

My improved system for the spindle and table-drive of boring mills is illustrated and described herein with sufficient clearness to enable those skilled in the art of boring m1ll construction to make and usethe same.

The objectof this invention is to provide a system of lubrication whereby a liberal quantity of lubricant may be continuously delivered to the table spindle of a boring mill, and to the bearings of and adjacent to said spindle, also to the drive for said. table.

A further object is to provide means,

whereby the lubricant so used may be freed. from impurities, foreign matter, etc, which may have entered the same, as 1t is being c1rculated through the system.

The construction whereby I attain said objects and embody said invention, is clearly ,illustrated in the drawings, the respective 30 figures of which are as follows:

Figure 1 is a central vertical section through the spindle of a boring mill which is equipped in accordance with my nvention. Fig. 2 is a central, vertical sectlon of the lower portion of thebearing for said spindle. Fig. 3 is a central, vertical section and the lower portion of the bed, on a line of the lower portion of the spindle. Fig. 4 is a side elevation of a boring mill embodying my improved lubricating system, portions being broken away to illustrate the embodiment of said invention more clearly. Fig. 5 is a vertical'section of the lower portion of the bed of a boring mill which embodies my invention, and shows what is termed the sump, thatis, a reservoir 1nt o which the lubricant gathers or drains as 1t drips from the various operative portions of the machine to which it has been delivered in accordance with my invention. Fig. 6 is a central vertical section through-the table parallel with the axis of the table-driving pinion and its shaft, and is especially illustrative of that portion of the lubricating system which relates to the table-drive.

The same reference numerals are applied to identical parts in all the views.

The construction herein shown is substantially as follows: Around the outer portion of the conical bearing 1 of the spindle I provide a channel 2 for the reception of lubricant, which is delivered to said channel through the pipe 3. In the face of said bearing I form a number of radial grooves, i

one of which is shown at 4, which are for the purpose of permitting the lubricant to How inwardly to the annular space.5 which extends around the upper portion of the spindle 6. Said space insures an even distribution and generous supply of lubricant all around the upper portion of said spindle.

A number of vertically-disposed longitudinal grooves, one of which is shown at 7, are formed in the periphery of said spindle 6, wherein the lubricant flows downward, and whereby it is evenly applied upon all portions of the bearing of said spindle, as the spindle revolves. At the lower end of said spindle 6 is formed an annular channel 8 into which the lubricant passes from said grooves 7 The walls of said channel or Fig. 2which is pressed into the lower end of the bearing 10. Into the lower end of chamber 8 are formed by .a sleeve 9,see

jects upwardly Into the opening of said spindle. The opening of said spindle is provided with a downwardly-extending sleeve 13,-see Fig. 3which is for the purpose of preventing borings, etc., from entering chamber 8. From said chamber 8, a

drain-pipe 14 leads to the sump 15, through which pipe the lubricant passes from the spindle to said sump by gravity. Said sump is a suitably-formed receptacle located in the lower portion of the bed of the mill and into which lubricant drains from various operat ing portions of the machine, as shown espe cially in Fig. 6, thus permitting the lubricant to be reused for a considerable length of time without being renewed, and the element which makes such continuous use possible. is

chain 18, which passes around a pulley or sprocket 19 that is mounted upon the main driving shaft 20. As illustrated in the drawings, said belt also passes around a pulley 21 which operates the rapid traverse of the elements to which, normally, a slow feed movement is imparted.

It can now be readily understood that the lubricating system here shown involves a continuous circulation of a comparatively large quantity of lubricant, which flows by gravity from the reservoir 16 through pipe .3 to the channel 2, thence through the radial grooves 4 to space 5, which it fills, thence through the grooves 7 to chamber 8, thence through pipe 14 to sump 15, from whence it is tranferred by means of pump 17 to the starting point,said reservoir. In order to properly clarify said lubricant and free it from any foreign matter which may have entered it, I place within the upper portion of said reservoir a suitable filtering or straining device 22, upon which the oil is delivered by pipe 17, and through which filtering device the oil must pass before it can reenter said pipe 3, or any of the other delivery pipes such as pipe X in Fig. 6 through which lubricant is delivered to certain other parts of the machine.

From an inspection of Fig. 1 it will be noted that the lubricant is free to overflow from the annular channel 2 into the annular gear channel 23 in which the table gear 24 operates. From said channel 23 said lubricant drains into the pinion-pocket 26,-see

Fig. 6in which the table-driving pinion I 27 is located. From said pocket 26 the lubricant drains into sump 15 through the ballbearing 28, thus freely lubricating the same. A sufficient quantity of lubricant is retained within said pocket 26 to submerge the lower portion of said pinion 27 whereby a generous quantity of lubricant is automatically applied tosaid pinion'and to the table gear 24 which is driven by said pinion.

I claim: I

1. A lubricating system for the spindle and table-drive for vertical boring and turning mills, comprising in combination, a bed of such mill having as features thereof, a conical bearing and a vertically-disposed bearing, a lubricant channel surrounding said conical bearing, an annular space formed at the inner edge of said conical bearing adjacent to the upper portion of said vertically-disposed bearing, radiallydisposed grooves in said conical bearing adapted for the passage of lubricant from said I lubricant channel to said annular space, and a sump positioned in the lower portion of said bed; a table for such mill, a vertically-disposed spindle for said table, having as features thereof, conical and vertical bearing-faces adapted to cooperate with said conical and vertical bearings respectively in said bed, there being a chamber adjacent to the lower end of said vertically-disposed bearing, also vertically-disposed grooves in said vertically-disposed bearing face arranged for the passage of lubricant from said annular space toAsaid chamber; a lubricant supply having communication with said lubricant channel and arranged to supply lubricant thereto continuously, there being a conduit arranged for the passage of lubricant from said chamber to said sump, and means adapted to automatically return said lubricant from said sump to said lubricant supply.

2. A lubricating system for the spindle and table-drive for vertical boring and turning mills comprising in combination; a bed for such mill. having as features thereof, a conical bearing and a vertically-disposed bearing, a lubricant channel surrounding said conical bearing, an annular space formed at the inner edge of said conical bearing adjacent to the upper portion of said vertically-disposed bearing, radially-disposed grooves in said conical bearing adapted for the passage of lubricant from said lubricant channel to said annular space, a gear-channel in said bed adapted to receive lubricant from said lubricant-channel and a sump positioned in the lower portion of said bed; a table for such mill, a driving gear for said table secured to the under side thereof, the face of said gear being positioned within said gear-channel, a pinion engaging said gear, operable to drive the same and operating within said gear-channel, a vertically-disposed spindle for said table having as features thereof, conical and yvertical bearing-faces adapted to cooperate with the conical and vertical bearings respectively in said bed, there being a chamber adjacent to the lower end of said vertically-disposed bearing, also vertically-disposed grooves in said vertically-disposed bearing face arranged for the passage of lubricant from said annular space to said chamber; a lubricant supply having communication with said lubricant channel and arranged to supply lubricant thereto, there being a conduit arranged for the passage of lubricant from said chamber to said sump, and means adapted to automatically return said lubricant from said sump to said lubricant supply.

3. A lubricating system for the spindle and table-drive for vertical boring and turning mills comprising in combination, a bed of such mill having as features thereof an annular gear-channel arranged to have lubricant supplied thereto, and a sump positioned in the lower portion of said bed; a table of such mill, a driving-gear for said table, a pinion arranged in mesh with said gear and operable to drive the same, said gear and said pinion being operable within said channel; there being a passage arranged for the flow of lubricant from said gears channel to said sump.

4. Elements of a lubricating system forthe spindle and table drive for vertical boring and turning mills comprising in combination, a bed of such mill having as a feature thereof an annular gear-channel arranged to have lubricant supplied thereto, a table for such mill, a driving-gear for such table, a pinion arranged in mesh with said gear and operable to drive the same, a shaft upon which said gear is mounted, a bearing for said shaft positioned in proximity to said pinion, said gear and said pinion being operable in said channel, means for supplying lubricant to said channel, said channel a ranged to have lubricant supplied thereto,

means adapted to supply lubricant to said channel, a driving gear for said table, a pinion arranged in mesh with said gear and operable to drive the same, said gear and said pinion being operable within said channel for the purpose of having lubricant supplied thereto.

In testimony whereof I aflix my signature in presence of two witnesses.

FREDERICK F. CLARKE.

Witnesses:

MARY B. EcKER'r, RAY S. CLARKE. 

